Simatic Central Processing 6ES7318-3FL01-0AB0 6ES7 318-3FL01-0AB0 6ES7318-3FLO1-OABO

Siemens 6ES7318-3FL01-0AB0 SIMATIC S7-300 CPU 319F-3 PN/DP

Overview

The 6ES7318-3FL01-0AB0 is a SIMATIC S7-300 CPU 319F-3 PN/DP. Siemens identifies it as a central processing unit with 2.5 MB work memory, a 1st interface MPI/DP at 12 Mbps, a 2nd interface DP master/slave, and a 3rd interface Ethernet PROFINET. Siemens also states that a Micro Memory Card is required, and that the product is supplied as a spare part.

This CPU belongs to the high-performance end of the S7-300 family.

Its published interface set and memory capacity make it suitable for applications where central CPU performance and multiple communication paths are both part of the original design. The product data also identifies isochronous mode via the second PROFIBUS DP or PROFINET interface, which places it clearly in the performance-focused class of S7-300 CPUs.

Technical Data

Application Value

This CPU is suited to S7-300 control systems where the installed machine or cabinet already depends on a high-performance CPU with PROFIBUS and PROFINET communication in the same unit.

Its memory size and interface structure make it relevant to applications where a basic S7-300 CPU would not match the original project scope.

In replacement work, keeping the same CPU class helps preserve the original communication layout, CPU capability, and memory profile.

Since Siemens identifies this unit as a spare part, it is especially relevant in maintenance and lifecycle support of installed S7-300 systems.

Selection Notes

The key checks are the CPU 319F-3 PN/DP designation, the 2.5 MB work memory, the three-interface structure, and the requirement for a Micro Memory Card. These points define whether the CPU matches the installed S7-300 system.

FAQ

Q1: What kind of CPU is 6ES7318-3FL01-0AB0?
It is a SIMATIC S7-300 CPU 319F-3 PN/DP. Siemens identifies it as a central processing unit with 2.5 MB work memory and three integrated communication interfaces, placing it in the higher-performance class of the S7-300 family.

Q2: Why is the three-interface structure important?
Because the CPU is not only a processor but also a communication center in the rack. Siemens lists MPI/DP, PROFIBUS DP master/slave, and Ethernet PROFINET on this model.

That interface combination is one of the main reasons it is chosen for more demanding S7-300 systems.

Q3: What does the 2.5 MB work memory indicate?
It indicates the memory class of the CPU. This matters because memory size affects how much logic and active data the installed project can keep in the CPU.

Matching the same work-memory class helps preserve the original controller role in the system.

Q4: Why is the Micro Memory Card requirement relevant?
Siemens explicitly states that a Micro Memory Card is required for this CPU. That requirement is part of the hardware setup of the unit and should be confirmed when replacing the processor in an installed S7-300 rack.

Q5: What should be checked before ordering?
Check the installed part number, confirm the CPU is 319F-3 PN/DP, verify the 2.5 MB work-memory class, and make sure the system depends on the same MPI/DP, DP master/slave, and PROFINET interface combination. Also confirm the Micro Memory Card requirement.